/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hudi.aws.credentials;

import software.amazon.awssdk.auth.credentials.AwsCredentialsProvider;
import software.amazon.awssdk.auth.credentials.AwsCredentialsProviderChain;
import software.amazon.awssdk.auth.credentials.DefaultCredentialsProvider;

import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

/**
 * Factory class for Hoodie AWSCredentialsProvider.
 */
public class HoodieAWSCredentialsProviderFactory {
  public static AwsCredentialsProvider getAwsCredentialsProvider(Properties props) {
    return getAwsCredentialsProviderChain(props);
  }

  private static AwsCredentialsProvider getAwsCredentialsProviderChain(Properties props) {
    List<AwsCredentialsProvider> providers = new ArrayList<>();
    if (HoodieConfigAWSAssumedRoleCredentialsProvider.validConf(props)) {
      providers.add(new HoodieConfigAWSAssumedRoleCredentialsProvider(props));
    }
    HoodieConfigAWSCredentialsProvider hoodieConfigAWSCredentialsProvider = new HoodieConfigAWSCredentialsProvider(props);
    if (hoodieConfigAWSCredentialsProvider.resolveCredentials() != null) {
      providers.add(hoodieConfigAWSCredentialsProvider);
    }
    providers.add(DefaultCredentialsProvider.builder()
            .reuseLastProviderEnabled(true)
            .build());
    AwsCredentialsProviderChain providerChain = AwsCredentialsProviderChain.builder()
            .credentialsProviders(providers)
            .reuseLastProviderEnabled(true)
            .build();
    return providerChain;
  }
}
